1Make brown butter by cooking butter over low heat until it turns golden brown.
2Add brown butter to a bowl with ¾ cup of cocoa and mix well. This helps to bloom the cocoa, adding flavor and depth.
3In a separate bowl, combine 3 eggs with 1 ¾ cup of light brown sugar. Whisk until super fluffy and you can barely feel any sugar granules between your fingers.
4Add the chocolate mixture to the egg mixture and mix thoroughly.
5Add ¾ cup of flour, vanilla, and a pinch of salt to the combined mixture and mix.
6Add ½ cup of chocolate chips or chopped chocolate to the batter and mix gently.
7Pour the batter into a baking pan and bake in a 350°F oven for 20 to 25 minutes, or until it looks set.